def provides(self, ref):
assert isinstance(ref, Ref)
if ref in self._table:
return True
targets = [key for key in self._table if Ref.subscope(key, ref)]
if not targets:
return False
else:
for key in sorted(targets, reverse=True):
scope = self._table[key]
if not isinstance(scope, Namable):
continue
subscope = Ref.subscope(key, ref)
# If subscope is empty, then we should've found it in the ref table.
assert not subscope.is_empty()
if scope.provides(subscope):
return True
return False
def find(self, ref):
if ref in self._table:
return self._table[ref]
targets = [key for key in self._table if Ref.subscope(key, ref)]
if not targets:
raise Namable.NotFound(self, ref)
else:
for key in sorted(targets, reverse=True):
scope = self._table[key]
if not isinstance(scope, Namable):
continue
subscope = Ref.subscope(key, ref)
# If subscope is empty, then we should've found it in the ref table.
assert not subscope.is_empty()
try:
resolved = scope.find(subscope)
return resolved
except Namable.Error as e:
continue
raise Namable.NotFound(self, ref)
